SUMMERS GEORGE J. (1987). MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. SUDHA PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)SUMMERS GEORGE J. MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. NEW DELHI: SUDHA PUBLICATIONS, 1987.
Lua MLA (9ú heag.)SUMMERS GEORGE J. MIND TEASERS LOGIC PUZZLES AND GAMES OF DEDUCTION. SUDHA PUBLICATIONS, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.